1. Heating and cooling
Recall that pure zirconium and hafnium exhibit an allotropic transformation from the α-phase (hexagonal compact) at low temperature to the β-phase (cubic centered) at high temperature. The phase-change temperature is 863°C for zirconium and 1,760°C for hafnium.
1.1 Heat equation
The heat equation is written :
with :
- ρ...
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Heating and cooling
Heat treatments in the – range Influence on microstructure and properties
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